gpu/command_buffer/service/framebuffer_manager.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "gpu/command_buffer/service/framebuffer_manager.h"
   6 #include "base/logging.h"
   7 #include "base/strings/stringprintf.h"
   8 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
   9 #include "gpu/command_buffer/service/renderbuffer_manager.h"
  10 #include "gpu/command_buffer/service/texture_manager.h"
  11 #include "ui/gl/gl_bindings.h"
  12
  13 namespace gpu {
  14 namespace gles2 {
  15
  16 DecoderFramebufferState::DecoderFramebufferState()
  17     : clear_state_dirty(false),
  18       bound_read_framebuffer(NULL),
  19       bound_draw_framebuffer(NULL) {
  20 }
  21
  22 DecoderFramebufferState::~DecoderFramebufferState() {
  23 }
  24
  25 Framebuffer::FramebufferComboCompleteMap*
  26     Framebuffer::framebuffer_combo_complete_map_;
  27
  28 // Framebuffer completeness is not cacheable on OS X because of dynamic
  29 // graphics switching.
  30 // http://crbug.com/180876
  31 #if defined(OS_MACOSX)
  32 bool Framebuffer::allow_framebuffer_combo_complete_map_ = false;
  33 #else
  34 bool Framebuffer::allow_framebuffer_combo_complete_map_ = true;
  35 #endif
  36
  37 void Framebuffer::ClearFramebufferCompleteComboMap() {
  38   if (framebuffer_combo_complete_map_) {
  39     framebuffer_combo_complete_map_->clear();
  40   }
  41 }
  42
  43 class RenderbufferAttachment
  44     : public Framebuffer::Attachment {
  45  public:
  46   explicit RenderbufferAttachment(
  47       Renderbuffer* renderbuffer)
  48       : renderbuffer_(renderbuffer) {
  49   }
  50
  51   GLsizei width() const override { return renderbuffer_->width(); }
  52
  53   GLsizei height() const override { return renderbuffer_->height(); }
  54
  55   GLenum internal_format() const override {
  56     return renderbuffer_->internal_format();
  57   }
  58
  59   GLenum texture_type() const override { return 0; }
  60
  61   GLsizei samples() const override { return renderbuffer_->samples(); }
  62
  63   GLuint object_name() const override { return renderbuffer_->client_id(); }
  64
  65   bool cleared() const override { return renderbuffer_->cleared(); }
  66
  67   void SetCleared(RenderbufferManager* renderbuffer_manager,
  68                   TextureManager* /* texture_manager */,
  69                   bool cleared) override {
  70     renderbuffer_manager->SetCleared(renderbuffer_.get(), cleared);
  71   }
  72
  73   bool IsTexture(TextureRef* /* texture */) const override { return false; }
  74
  75   bool IsRenderbuffer(Renderbuffer* renderbuffer) const override {
  76     return renderbuffer_.get() == renderbuffer;
  77   }
  78
  79   bool CanRenderTo() const override { return true; }
  80
  81   void DetachFromFramebuffer(Framebuffer* framebuffer) const override {
  82     // Nothing to do for renderbuffers.
  83   }
  84
  85   bool ValidForAttachmentType(GLenum attachment_type,
  86                               uint32 max_color_attachments) override {
  87     uint32 need = GLES2Util::GetChannelsNeededForAttachmentType(
  88         attachment_type, max_color_attachments);
  89     uint32 have = GLES2Util::GetChannelsForFormat(internal_format());
  90     return (need & have) != 0;
  91   }
  92
  93   Renderbuffer* renderbuffer() const {
  94     return renderbuffer_.get();
  95   }
  96
  97   size_t GetSignatureSize(TextureManager* texture_manager) const override {
  98     return renderbuffer_->GetSignatureSize();
  99   }
 100
 101   void AddToSignature(TextureManager* texture_manager,
 102                       std::string* signature) const override {
 103     DCHECK(signature);
 104     renderbuffer_->AddToSignature(signature);
 105   }
 106
 107   void OnWillRenderTo() const override {}
 108   void OnDidRenderTo() const override {}
 109   bool FormsFeedbackLoop(TextureRef* /* texture */,
 110                          GLint /*level */) const override {
 111     return false;
 112   }
 113
 114  protected:
 115   ~RenderbufferAttachment() override {}
 116
 117  private:
 118   scoped_refptr<Renderbuffer> renderbuffer_;
 119
 120   DISALLOW_COPY_AND_ASSIGN(RenderbufferAttachment);
 121 };
 122
 123 class TextureAttachment
 124     : public Framebuffer::Attachment {
 125  public:
 126   TextureAttachment(
 127       TextureRef* texture_ref, GLenum target, GLint level, GLsizei samples)
 128       : texture_ref_(texture_ref),
 129         target_(target),
 130         level_(level),
 131         samples_(samples) {
 132   }
 133
 134   GLsizei width() const override {
 135     GLsizei temp_width = 0;
 136     GLsizei temp_height = 0;
 137     texture_ref_->texture()->GetLevelSize(
 138         target_, level_, &temp_width, &temp_height);
 139     return temp_width;
 140   }
 141
 142   GLsizei height() const override {
 143     GLsizei temp_width = 0;
 144     GLsizei temp_height = 0;
 145     texture_ref_->texture()->GetLevelSize(
 146         target_, level_, &temp_width, &temp_height);
 147     return temp_height;
 148   }
 149
 150   GLenum internal_format() const override {
 151     GLenum temp_type = 0;
 152     GLenum temp_internal_format = 0;
 153     texture_ref_->texture()->GetLevelType(
 154         target_, level_, &temp_type, &temp_internal_format);
 155     return temp_internal_format;
 156   }
 157
 158   GLenum texture_type() const override {
 159     GLenum temp_type = 0;
 160     GLenum temp_internal_format = 0;
 161     texture_ref_->texture()->GetLevelType(
 162         target_, level_, &temp_type, &temp_internal_format);
 163     return temp_type;
 164   }
 165
 166   GLsizei samples() const override { return samples_; }
 167
 168   GLuint object_name() const override { return texture_ref_->client_id(); }
 169
 170   bool cleared() const override {
 171     return texture_ref_->texture()->IsLevelCleared(target_, level_);
 172   }
 173
 174   void SetCleared(RenderbufferManager* /* renderbuffer_manager */,
 175                   TextureManager* texture_manager,
 176                   bool cleared) override {
 177     texture_manager->SetLevelCleared(
 178         texture_ref_.get(), target_, level_, cleared);
 179   }
 180
 181   bool IsTexture(TextureRef* texture) const override {
 182     return texture == texture_ref_.get();
 183   }
 184
 185   bool IsRenderbuffer(Renderbuffer* /* renderbuffer */) const override {
 186     return false;
 187   }
 188
 189   TextureRef* texture() const {
 190     return texture_ref_.get();
 191   }
 192
 193   bool CanRenderTo() const override {
 194     return texture_ref_->texture()->CanRenderTo();
 195   }
 196
 197   void DetachFromFramebuffer(Framebuffer* framebuffer) const override {
 198     texture_ref_->texture()->DetachFromFramebuffer();
 199     framebuffer->OnTextureRefDetached(texture_ref_.get());
 200   }
 201
 202   bool ValidForAttachmentType(GLenum attachment_type,
 203                               uint32 max_color_attachments) override {
 204     GLenum type = 0;
 205     GLenum internal_format = 0;
 206     if (!texture_ref_->texture()->GetLevelType(
 207         target_, level_, &type, &internal_format)) {
 208       return false;
 209     }
 210     uint32 need = GLES2Util::GetChannelsNeededForAttachmentType(
 211         attachment_type, max_color_attachments);
 212     uint32 have = GLES2Util::GetChannelsForFormat(internal_format);
 213
 214     // Workaround for NVIDIA drivers that incorrectly expose these formats as
 215     // renderable:
 216     if (internal_format == GL_LUMINANCE || internal_format == GL_ALPHA ||
 217         internal_format == GL_LUMINANCE_ALPHA) {
 218       return false;
 219     }
 220     return (need & have) != 0;
 221   }
 222
 223   size_t GetSignatureSize(TextureManager* texture_manager) const override {
 224     return texture_manager->GetSignatureSize();
 225   }
 226
 227   void AddToSignature(TextureManager* texture_manager,
 228                       std::string* signature) const override {
 229     DCHECK(signature);
 230     texture_manager->AddToSignature(
 231         texture_ref_.get(), target_, level_, signature);
 232   }
 233
 234   void OnWillRenderTo() const override {
 235     texture_ref_->texture()->OnWillModifyPixels();
 236   }
 237
 238   void OnDidRenderTo() const override {
 239     texture_ref_->texture()->OnDidModifyPixels();
 240   }
 241
 242   bool FormsFeedbackLoop(TextureRef* texture, GLint level) const override {
 243     return texture == texture_ref_.get() && level == level_;
 244   }
 245
 246  protected:
 247   ~TextureAttachment() override {}
 248
 249  private:
 250   scoped_refptr<TextureRef> texture_ref_;
 251   GLenum target_;
 252   GLint level_;
 253   GLsizei samples_;
 254
 255   DISALLOW_COPY_AND_ASSIGN(TextureAttachment);
 256 };
 257
 258 FramebufferManager::TextureDetachObserver::TextureDetachObserver() {}
 259
 260 FramebufferManager::TextureDetachObserver::~TextureDetachObserver() {}
 261
 262 FramebufferManager::FramebufferManager(
 263     uint32 max_draw_buffers, uint32 max_color_attachments)
 264     : framebuffer_state_change_count_(1),
 265       framebuffer_count_(0),
 266       have_context_(true),
 267       max_draw_buffers_(max_draw_buffers),
 268       max_color_attachments_(max_color_attachments) {
 269   DCHECK_GT(max_draw_buffers_, 0u);
 270   DCHECK_GT(max_color_attachments_, 0u);
 271 }
 272
 273 FramebufferManager::~FramebufferManager() {
 274   DCHECK(framebuffers_.empty());
 275   // If this triggers, that means something is keeping a reference to a
 276   // Framebuffer belonging to this.
 277   CHECK_EQ(framebuffer_count_, 0u);
 278 }
 279
 280 void Framebuffer::MarkAsDeleted() {
 281   deleted_ = true;
 282   while (!attachments_.empty()) {
 283     Attachment* attachment = attachments_.begin()->second.get();
 284     attachment->DetachFromFramebuffer(this);
 285     attachments_.erase(attachments_.begin());
 286   }
 287 }
 288
 289 void FramebufferManager::Destroy(bool have_context) {
 290   have_context_ = have_context;
 291   framebuffers_.clear();
 292 }
 293
 294 void FramebufferManager::StartTracking(
 295     Framebuffer* /* framebuffer */) {
 296   ++framebuffer_count_;
 297 }
 298
 299 void FramebufferManager::StopTracking(
 300     Framebuffer* /* framebuffer */) {
 301   --framebuffer_count_;
 302 }
 303
 304 void FramebufferManager::CreateFramebuffer(
 305     GLuint client_id, GLuint service_id) {
 306   std::pair<FramebufferMap::iterator, bool> result =
 307       framebuffers_.insert(
 308           std::make_pair(
 309               client_id,
 310               scoped_refptr<Framebuffer>(
 311                   new Framebuffer(this, service_id))));
 312   DCHECK(result.second);
 313 }
 314
 315 Framebuffer::Framebuffer(
 316     FramebufferManager* manager, GLuint service_id)
 317     : manager_(manager),
 318       deleted_(false),
 319       service_id_(service_id),
 320       has_been_bound_(false),
 321       framebuffer_complete_state_count_id_(0) {
 322   manager->StartTracking(this);
 323   DCHECK_GT(manager->max_draw_buffers_, 0u);
 324   draw_buffers_.reset(new GLenum[manager->max_draw_buffers_]);
 325   draw_buffers_[0] = GL_COLOR_ATTACHMENT0;
 326   for (uint32 i = 1; i < manager->max_draw_buffers_; ++i)
 327     draw_buffers_[i] = GL_NONE;
 328 }
 329
 330 Framebuffer::~Framebuffer() {
 331   if (manager_) {
 332     if (manager_->have_context_) {
 333       GLuint id = service_id();
 334       glDeleteFramebuffersEXT(1, &id);
 335     }
 336     manager_->StopTracking(this);
 337     manager_ = NULL;
 338   }
 339 }
 340
 341 bool Framebuffer::HasUnclearedAttachment(
 342     GLenum attachment) const {
 343   AttachmentMap::const_iterator it =
 344       attachments_.find(attachment);
 345   if (it != attachments_.end()) {
 346     const Attachment* attachment = it->second.get();
 347     return !attachment->cleared();
 348   }
 349   return false;
 350 }
 351
 352 bool Framebuffer::HasUnclearedColorAttachments() const {
 353   for (AttachmentMap::const_iterator it = attachments_.begin();
 354        it != attachments_.end(); ++it) {
 355     if (it->first >= GL_COLOR_ATTACHMENT0 &&
 356         it->first < GL_COLOR_ATTACHMENT0 + manager_->max_draw_buffers_) {
 357       const Attachment* attachment = it->second.get();
 358       if (!attachment->cleared())
 359         return true;
 360     }
 361   }
 362   return false;
 363 }
 364
 365 void Framebuffer::ChangeDrawBuffersHelper(bool recover) const {
 366   scoped_ptr<GLenum[]> buffers(new GLenum[manager_->max_draw_buffers_]);
 367   for (uint32 i = 0; i < manager_->max_draw_buffers_; ++i)
 368     buffers[i] = GL_NONE;
 369   for (AttachmentMap::const_iterator it = attachments_.begin();
 370        it != attachments_.end(); ++it) {
 371     if (it->first >= GL_COLOR_ATTACHMENT0 &&
 372         it->first < GL_COLOR_ATTACHMENT0 + manager_->max_draw_buffers_) {
 373       buffers[it->first - GL_COLOR_ATTACHMENT0] = it->first;
 374     }
 375   }
 376   bool different = false;
 377   for (uint32 i = 0; i < manager_->max_draw_buffers_; ++i) {
 378     if (buffers[i] != draw_buffers_[i]) {
 379       different = true;
 380       break;
 381     }
 382   }
 383   if (different) {
 384     if (recover)
 385       glDrawBuffersARB(manager_->max_draw_buffers_, draw_buffers_.get());
 386     else
 387       glDrawBuffersARB(manager_->max_draw_buffers_, buffers.get());
 388   }
 389 }
 390
 391 void Framebuffer::PrepareDrawBuffersForClear() const {
 392   bool recover = false;
 393   ChangeDrawBuffersHelper(recover);
 394 }
 395
 396 void Framebuffer::RestoreDrawBuffersAfterClear() const {
 397   bool recover = true;
 398   ChangeDrawBuffersHelper(recover);
 399 }
 400
 401 void Framebuffer::MarkAttachmentAsCleared(
 402       RenderbufferManager* renderbuffer_manager,
 403       TextureManager* texture_manager,
 404       GLenum attachment,
 405       bool cleared) {
 406   AttachmentMap::iterator it = attachments_.find(attachment);
 407   if (it != attachments_.end()) {
 408     Attachment* a = it->second.get();
 409     if (a->cleared() != cleared) {
 410       a->SetCleared(renderbuffer_manager,
 411                     texture_manager,
 412                     cleared);
 413     }
 414   }
 415 }
 416
 417 void Framebuffer::MarkAttachmentsAsCleared(
 418       RenderbufferManager* renderbuffer_manager,
 419       TextureManager* texture_manager,
 420       bool cleared) {
 421   for (AttachmentMap::iterator it = attachments_.begin();
 422        it != attachments_.end(); ++it) {
 423     Attachment* attachment = it->second.get();
 424     if (attachment->cleared() != cleared) {
 425       attachment->SetCleared(renderbuffer_manager, texture_manager, cleared);
 426     }
 427   }
 428 }
 429
 430 bool Framebuffer::HasDepthAttachment() const {
 431   return attachments_.find(GL_DEPTH_STENCIL_ATTACHMENT) != attachments_.end() ||
 432          attachments_.find(GL_DEPTH_ATTACHMENT) != attachments_.end();
 433 }
 434
 435 bool Framebuffer::HasStencilAttachment() const {
 436   return attachments_.find(GL_DEPTH_STENCIL_ATTACHMENT) != attachments_.end() ||
 437          attachments_.find(GL_STENCIL_ATTACHMENT) != attachments_.end();
 438 }
 439
 440 GLenum Framebuffer::GetColorAttachmentFormat() const {
 441   AttachmentMap::const_iterator it = attachments_.find(GL_COLOR_ATTACHMENT0);
 442   if (it == attachments_.end()) {
 443     return 0;
 444   }
 445   const Attachment* attachment = it->second.get();
 446   return attachment->internal_format();
 447 }
 448
 449 GLenum Framebuffer::GetColorAttachmentTextureType() const {
 450   AttachmentMap::const_iterator it = attachments_.find(GL_COLOR_ATTACHMENT0);
 451   if (it == attachments_.end()) {
 452     return 0;
 453   }
 454   const Attachment* attachment = it->second.get();
 455   return attachment->texture_type();
 456 }
 457
 458 GLenum Framebuffer::IsPossiblyComplete() const {
 459   if (attachments_.empty()) {
 460     return GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT;
 461   }
 462
 463   GLsizei width = -1;
 464   GLsizei height = -1;
 465   for (AttachmentMap::const_iterator it = attachments_.begin();
 466        it != attachments_.end(); ++it) {
 467     GLenum attachment_type = it->first;
 468     Attachment* attachment = it->second.get();
 469     if (!attachment->ValidForAttachmentType(attachment_type,
 470                                             manager_->max_color_attachments_)) {
 471       return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT;
 472     }
 473     if (width < 0) {
 474       width = attachment->width();
 475       height = attachment->height();
 476       if (width == 0 || height == 0) {
 477         return GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT;
 478       }
 479     } else {
 480       if (attachment->width() != width || attachment->height() != height) {
 481         return GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS_EXT;
 482       }
 483     }
 484
 485     if (!attachment->CanRenderTo()) {
 486       return GL_FRAMEBUFFER_UNSUPPORTED;
 487     }
 488   }
 489
 490   // This does not mean the framebuffer is actually complete. It just means our
 491   // checks passed.
 492   return GL_FRAMEBUFFER_COMPLETE;
 493 }
 494
 495 GLenum Framebuffer::GetStatus(
 496     TextureManager* texture_manager, GLenum target) const {
 497   // Check if we have this combo already.
 498   std::string signature;
 499   if (allow_framebuffer_combo_complete_map_) {
 500     size_t signature_size = sizeof(target);
 501     for (AttachmentMap::const_iterator it = attachments_.begin();
 502          it != attachments_.end(); ++it) {
 503       Attachment* attachment = it->second.get();
 504       signature_size += sizeof(it->first) +
 505                         attachment->GetSignatureSize(texture_manager);
 506     }
 507
 508     signature.reserve(signature_size);
 509     signature.append(reinterpret_cast<const char*>(&target), sizeof(target));
 510
 511     for (AttachmentMap::const_iterator it = attachments_.begin();
 512          it != attachments_.end(); ++it) {
 513       Attachment* attachment = it->second.get();
 514       signature.append(reinterpret_cast<const char*>(&it->first),
 515                        sizeof(it->first));
 516       attachment->AddToSignature(texture_manager, &signature);
 517     }
 518     DCHECK(signature.size() == signature_size);
 519
 520     if (!framebuffer_combo_complete_map_) {
 521       framebuffer_combo_complete_map_ = new FramebufferComboCompleteMap();
 522     }
 523
 524     FramebufferComboCompleteMap::const_iterator it =
 525         framebuffer_combo_complete_map_->find(signature);
 526     if (it != framebuffer_combo_complete_map_->end()) {
 527       return GL_FRAMEBUFFER_COMPLETE;
 528     }
 529   }
 530
 531   GLenum result = glCheckFramebufferStatusEXT(target);
 532
 533   // Insert the new result into the combo map.
 534   if (allow_framebuffer_combo_complete_map_ &&
 535       result == GL_FRAMEBUFFER_COMPLETE) {
 536     framebuffer_combo_complete_map_->insert(std::make_pair(signature, true));
 537   }
 538
 539   return result;
 540 }
 541
 542 bool Framebuffer::IsCleared() const {
 543   // are all the attachments cleaared?
 544   for (AttachmentMap::const_iterator it = attachments_.begin();
 545        it != attachments_.end(); ++it) {
 546     Attachment* attachment = it->second.get();
 547     if (!attachment->cleared()) {
 548       return false;
 549     }
 550   }
 551   return true;
 552 }
 553
 554 GLenum Framebuffer::GetDrawBuffer(GLenum draw_buffer) const {
 555   GLsizei index = static_cast<GLsizei>(
 556       draw_buffer - GL_DRAW_BUFFER0_ARB);
 557   CHECK(index >= 0 &&
 558         index < static_cast<GLsizei>(manager_->max_draw_buffers_));
 559   return draw_buffers_[index];
 560 }
 561
 562 void Framebuffer::SetDrawBuffers(GLsizei n, const GLenum* bufs) {
 563   DCHECK(n <= static_cast<GLsizei>(manager_->max_draw_buffers_));
 564   for (GLsizei i = 0; i < n; ++i)
 565     draw_buffers_[i] = bufs[i];
 566 }
 567
 568 bool Framebuffer::HasAlphaMRT() const {
 569   for (uint32 i = 0; i < manager_->max_draw_buffers_; ++i) {
 570     if (draw_buffers_[i] != GL_NONE) {
 571       const Attachment* attachment = GetAttachment(draw_buffers_[i]);
 572       if (!attachment)
 573         continue;
 574       if ((GLES2Util::GetChannelsForFormat(
 575                attachment->internal_format()) & 0x0008) != 0)
 576         return true;
 577     }
 578   }
 579   return false;
 580 }
 581
 582 void Framebuffer::UnbindRenderbuffer(
 583     GLenum target, Renderbuffer* renderbuffer) {
 584   bool done;
 585   do {
 586     done = true;
 587     for (AttachmentMap::const_iterator it = attachments_.begin();
 588          it != attachments_.end(); ++it) {
 589       Attachment* attachment = it->second.get();
 590       if (attachment->IsRenderbuffer(renderbuffer)) {
 591         // TODO(gman): manually detach renderbuffer.
 592         // glFramebufferRenderbufferEXT(target, it->first, GL_RENDERBUFFER, 0);
 593         AttachRenderbuffer(it->first, NULL);
 594         done = false;
 595         break;
 596       }
 597     }
 598   } while (!done);
 599 }
 600
 601 void Framebuffer::UnbindTexture(
 602     GLenum target, TextureRef* texture_ref) {
 603   bool done;
 604   do {
 605     done = true;
 606     for (AttachmentMap::const_iterator it = attachments_.begin();
 607          it != attachments_.end(); ++it) {
 608       Attachment* attachment = it->second.get();
 609       if (attachment->IsTexture(texture_ref)) {
 610         // TODO(gman): manually detach texture.
 611         // glFramebufferTexture2DEXT(target, it->first, GL_TEXTURE_2D, 0, 0);
 612         AttachTexture(it->first, NULL, GL_TEXTURE_2D, 0, 0);
 613         done = false;
 614         break;
 615       }
 616     }
 617   } while (!done);
 618 }
 619
 620 Framebuffer* FramebufferManager::GetFramebuffer(
 621     GLuint client_id) {
 622   FramebufferMap::iterator it = framebuffers_.find(client_id);
 623   return it != framebuffers_.end() ? it->second.get() : NULL;
 624 }
 625
 626 void FramebufferManager::RemoveFramebuffer(GLuint client_id) {
 627   FramebufferMap::iterator it = framebuffers_.find(client_id);
 628   if (it != framebuffers_.end()) {
 629     it->second->MarkAsDeleted();
 630     framebuffers_.erase(it);
 631   }
 632 }
 633
 634 void Framebuffer::DoUnbindGLAttachmentsForWorkaround(GLenum target) {
 635   // Replace all attachments with the default Renderbuffer.
 636   for (AttachmentMap::const_iterator it = attachments_.begin();
 637        it != attachments_.end(); ++it) {
 638     glFramebufferRenderbufferEXT(target, it->first, GL_RENDERBUFFER, 0);
 639   }
 640 }
 641
 642 void Framebuffer::AttachRenderbuffer(
 643     GLenum attachment, Renderbuffer* renderbuffer) {
 644   const Attachment* a = GetAttachment(attachment);
 645   if (a)
 646     a->DetachFromFramebuffer(this);
 647   if (renderbuffer) {
 648     attachments_[attachment] = scoped_refptr<Attachment>(
 649         new RenderbufferAttachment(renderbuffer));
 650   } else {
 651     attachments_.erase(attachment);
 652   }
 653   framebuffer_complete_state_count_id_ = 0;
 654 }
 655
 656 void Framebuffer::AttachTexture(
 657     GLenum attachment, TextureRef* texture_ref, GLenum target,
 658     GLint level, GLsizei samples) {
 659   const Attachment* a = GetAttachment(attachment);
 660   if (a)
 661     a->DetachFromFramebuffer(this);
 662   if (texture_ref) {
 663     attachments_[attachment] = scoped_refptr<Attachment>(
 664         new TextureAttachment(texture_ref, target, level, samples));
 665     texture_ref->texture()->AttachToFramebuffer();
 666   } else {
 667     attachments_.erase(attachment);
 668   }
 669   framebuffer_complete_state_count_id_ = 0;
 670 }
 671
 672 const Framebuffer::Attachment*
 673     Framebuffer::GetAttachment(
 674         GLenum attachment) const {
 675   AttachmentMap::const_iterator it = attachments_.find(attachment);
 676   if (it != attachments_.end()) {
 677     return it->second.get();
 678   }
 679   return NULL;
 680 }
 681
 682 void Framebuffer::OnTextureRefDetached(TextureRef* texture) {
 683   manager_->OnTextureRefDetached(texture);
 684 }
 685
 686 void Framebuffer::OnWillRenderTo() const {
 687   for (AttachmentMap::const_iterator it = attachments_.begin();
 688        it != attachments_.end(); ++it) {
 689     it->second->OnWillRenderTo();
 690   }
 691 }
 692
 693 void Framebuffer::OnDidRenderTo() const {
 694   for (AttachmentMap::const_iterator it = attachments_.begin();
 695        it != attachments_.end(); ++it) {
 696     it->second->OnDidRenderTo();
 697   }
 698 }
 699
 700 bool FramebufferManager::GetClientId(
 701     GLuint service_id, GLuint* client_id) const {
 702   // This doesn't need to be fast. It's only used during slow queries.
 703   for (FramebufferMap::const_iterator it = framebuffers_.begin();
 704        it != framebuffers_.end(); ++it) {
 705     if (it->second->service_id() == service_id) {
 706       *client_id = it->first;
 707       return true;
 708     }
 709   }
 710   return false;
 711 }
 712
 713 void FramebufferManager::MarkAttachmentsAsCleared(
 714     Framebuffer* framebuffer,
 715     RenderbufferManager* renderbuffer_manager,
 716     TextureManager* texture_manager) {
 717   DCHECK(framebuffer);
 718   framebuffer->MarkAttachmentsAsCleared(renderbuffer_manager,
 719                                         texture_manager,
 720                                         true);
 721   MarkAsComplete(framebuffer);
 722 }
 723
 724 void FramebufferManager::MarkAsComplete(
 725     Framebuffer* framebuffer) {
 726   DCHECK(framebuffer);
 727   framebuffer->MarkAsComplete(framebuffer_state_change_count_);
 728 }
 729
 730 bool FramebufferManager::IsComplete(
 731     Framebuffer* framebuffer) {
 732   DCHECK(framebuffer);
 733   return framebuffer->framebuffer_complete_state_count_id() ==
 734       framebuffer_state_change_count_;
 735 }
 736
 737 void FramebufferManager::OnTextureRefDetached(TextureRef* texture) {
 738   for (TextureDetachObserverVector::iterator it =
 739            texture_detach_observers_.begin();
 740        it != texture_detach_observers_.end();
 741        ++it) {
 742     TextureDetachObserver* observer = *it;
 743     observer->OnTextureRefDetachedFromFramebuffer(texture);
 744   }
 745 }
 746
 747 }  // namespace gles2
 748 }  // namespace gpu
 749
 750